 ;; Placement Functions ;;
 ;;;;;;;;;;;;;;;;;;;;;;;;;
 
-(def columns (range 0 6))
+(def columns (range 0 ncols))
 (def rows (range 0 nrows))
 
 (def α (/ π 12))

         (rotate (/ π 12) [0 1 0])
         (translate [0 0 13]))))

(def key-holes
  (apply union
         (for [column columns



(def nrows 4)
(def ncols 6)
(def lastrow (dec nrows))
(def cornerrow (dec lastrow))

